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Raman Spectral analysis of Particulates of Diesel Engine with DOC and CDPF After-treatment Devices

Zhihao Ma1Ying Chao1Lei Li1Bin Xu1Xin Xu2Fanhua Ma3

1. College of Vehicle and Motive Power Engineering, Henan University of Science and Technology2. Guangzhou Sunny Metal Incorporation3. State Key Laboratory of Automotive Safety and Energy, Tsinghua University

摘要:In order to study the effect of the after-treatment devices on the diesel engine particulates, a series of measurements were conducted. The after-treatment systems were an oxidation catalyst and two different catalytic contents of CDPFs. In this study, the effects of DOC and CDPFs on particulates were investigated by Raman spectra in order to clarify the composition and structure of the particulates. The results show that the Raman spectra of particulates are all made up of five peaks, while the Raman shift of the peaks observed no obvious change. The two groups of CDPFs led to the same increased trend of ID2/IG and ID4/IG, while the contrary trend of ID1/IG,, ID3/IG and IALL/IG, indicating that different catalytic effect changing the process of structure and components of the particulates. While after DOC+CDPFs, the ratios of ID1/IG, ID2/IG, ID1/IG, ID4/IG and IALL/IG are all increased, this indicates that DOC also has certain effect on the degree of graphitization, but more organic compounds are formed after DOC+CDPFs, that is, the reactivity of particulates increases.
会议名称:

2012 International Conference on Engineering Materials (ICEM 2012)

会议时间:

2012-12-30

会议地点:

Singapore, Singapore

  • 专辑:

    工程科技Ⅰ辑; 工程科技Ⅱ辑

  • 专题:

    化学; 汽车工业

  • 分类号:

    U464.134.4;O657.37

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